Not only is he being accused of cheating with multiple partners on his wife of seven years AND just checked into rehab for undisclosed issues, but he's also apparently stiffed the people who created his new cookbook!

WTF?!

Dean was doing well hosting the foodie competition show, Chopped Canada, so Harlequin publishing company decided to make a cookbook deal with him!

The Gourmet Dad was born, and Dean was reportedly given an advance of more than $250,000, partly to cover his expenses to make the book!

Sources have revealed the 47-year-old did not pay the following staffers that helped him every step of the way: